i'm john muller, in for rob nelson. >> and i'm paula faris. in his much-anticipated interview with oprah winfrey, lance armstrong called himself a flawed character. he also said he deserves condemnation after more than a decade of lying about using performance-enhancing drugs. >> as neal karlinsky reports, armstrong described cheating as part of his job. >> reporter: even though we knew it was coming, hearing lance armstrong saying it out loud was surreal. >> did you ever blood dope or use blood transfusions to enhance your cycling performance? >> yes. >> in all seven of your tour de france victories, did you ever take banned substances or blood dope? >> yes. >> reporter: so, why admit it now? armstrong blamed the momentum of his own story. >> this is too late. it's too late for probably most people. and that's my fault. you know, i've used this situation as one, big l repeated a lot of times. >> lance armstrong just confirmed he's tour de france win. >> reporter: the icon who transcended sports, hung around with movie stars and world leaders.